问题补充:
It wasgreat shock to the world that two aero-planes crashed intoWorld Trade Center in New York o September 11th, 2001.
A. a; /
B. a; the
C. the; the
D. /; the
答案:
A. a; /
(答案→)B. a; the
C. the; the
D. /; the
解析:选B。shock指代具体事情时为可数名词,a great shock意为“一次沉重的打击”;由普通名词构成的建筑类专有名词需加冠词,故答案为B。